After a schoolmate claims to be an alien and proves it by using heat vision, Clark investigates and believes the boy is from Krypton. Meanwhile, Helen confronts Lex over the locked room in the mansion that holds his investigation of Clark's secrets.
Elenco:
Tom Welling
,
Erica Durance
,
Allison Mack
,
Aaron Ashmore
,
Annette O'Toole
,
Callum Blue
,
Cassidy Freeman
,
Eric Johnson
,
James Marsters
,
Jensen Ackles
,
John Glover
,
John Schneider
,
Justin Hartley
,
Kristin Kreuk
,
Laura Vandervoort
,
Michael Rosenbaum
,
Sam Witwer
,
Samuel L. Jones
.